Disk tiller



Feb.27, 1945. w H. SMER i2,370,374

DISK T'ILLER -Filed Aug. 20. 1941 2 Sheets-Sheet 2 FIG. 3

K INVENTORv WALTER H. SILVER f. RN S Patented F eb. 27,y 1945 msn frniLEa Walter H. Silver, Molina lll., assignor to -Deerez Company, Moline, "111., a corporation .of Illinois V28 iClaims.

The presentinvention relates generally to agri-v culturalirnplements and more particularly to disk tillers, sometimes referred to as rdisk plows or harrow plows.

The object Aand general ,nature ofthe present invention is the provision of an .agricultural irnplement of this type in which `convenient .and easily operated means is .provided for changing the angle of cut of the gang .of disks .without aiecting the relation vbetween .the rearmost .disk and the `rear furrow wheel which normally vruns in the bottom of the furrow opened Vby Athe lrear disk. Another feature .of .the presentv invention is the provision of improved `steering connections whereby the implement is more easily controlled, both rin .the raised and lowered positions. :More specifically, it is a feature lof this invention to provide means swingablyconnecting .the forward end of the .disk gang tothe supporting A*frame yand shiftable means supporting the other ,end

of the disk gang on the frame, the .parts .being so related that the disk gang may be Idisposed in different positions of angular adjustment, thereby changing the .width of cut, while 4maintaining the landward edge of the -rear disk substantially in the same Vertical longitudinal `plane in all positions of adjustment.

Another `.feature of this invention is lthe .provision of improved .frame means facilitating the .attachment of a ylifting .crank axle -to the frame for accommodating the rocking 4movementof the crank axle relative thereto. Specifically, it :is a feature `of this invention yto provide fa pair of brackets, one having an opening therein andthe other 'having an open slot, whereby the crank axle, with certain portions already `xed .thereto, maybe connected with the .frame by inserting an end off the crank axleinsaid opening and disposing an intermediate .portion of the crank axle in the ,slotted bracket portion, whereby the crank axle is readily .mounted for .rocking .movement relative to the frame `notwitl'istanding that parts were previously connected 4to the 4crank axle. `In this respect the present vinvention is .an

,improvement over 'prior constructions Yin .which the crank axle was required 'to vbe inserted throughl openings in brackets bef-ore .any yof the parts could be attached to the crank axle.

Another important .feature of the present invention 4is the provision of a scraper assembly which is so supported on 'the disk Vgang that it remains in operative relation with respect lthereto when the disk gangis adjusted relative to the associated frame to change the width of .cut or for other reasons. Specifically, it is a `feature of this invention to provide a. disk gang in which thexends are connected ybyloearing supporte with the frame, in which the bearing supports are particularly constructed to permit. the .attachment of the scraper yassembly thereto, .the disk Y transport.

.These and other objects .and advantages of the present invention will be .apparent to those skilled in the art after .a consideration of the following detailed description, taken in conjunction with ,the .accompanying rdrawings in which the vpreferred embodiment of this :invention has Ibeen illustrated.

In thedrawings:

.Figure 1 is a top .perspective of a ld isk .tiller in .which the .principles -of .the .present invention have been incorporated; y

-Figure 2 is a fragmentary perspective view .showing the .method of supporting the scraper assembly;

.Figure 3 is .a :perspective three-quarter rear view .of the implement shown Vin Figure .1; Figurevi isa `fragmentary plan view,.on a re.- vduced scale, showing .the manner in which the width of cut maybe varied while retaining the rear disk .in substantially the same lateral -position relative to the rear furrow wheel;

Figure 5 is a fragmentary enlarged perspective of a portion of `the frame, showing the method l.of attaching and rockably supporting the crank axle; and v l Figure 6 .isa-sectional view of one ofthe bearing supports .for .the disk gang, .taken substantially along the .line .6 6 of .Figure 1.

Referring now to the drawings, more particularly to Figures 1 and 3, the present invention has been illustrated .as incorporated in ra disk tiller which, in general, includes a frame .structure l, a gang of disks 2, a .hitch device 3 and supportingwheels 4, 5 and 6. The tiller is-adapted to .be hitched to a tractor or-other source of power indicated .by the reference numeral .'l, the latter having :a dra-wbar 8 to which Ithe'fforward end of the hitch device 3 is connected.

The frame I of the disk tiller comprises a frame bar having a main portion I2 which is disposed generally diagonally and a rear portion |3, the forward part I4 of which extends generally diagonally in the other direction, more or less at a right angle to the section I2, the rear portion of the frame section I3 extending generally directly rearwardly, as indicated at I5. A pair of brackets I1 and I8 are welded or otherwise secured to the frame beam II in generally laterally spaced apart relation, the brackets IT and I8 being formed so that, as best shown in Figure 1, they extend laterally outwardly and forwardly with respect to the beam I I, being secured to the latter substantially at the junction between the two diagonal sections I2 and i4.. The laterally inner bracket I1 preferably is in the form of a plate member having an aperture 2I and openings 2.2 to which a sector 23 is bolted, as at 24 (Figure 3). A master depth controlling lever 25 is pivoted onthe upper bolt 24 and carries the usual detent mechanism cooperating with the sector 23. A brace 26 (Figure 5) is welded to the two brackets I1 and I8 to give them lateral rigidity. In axial alignment with the opening 2| in the laterally inner bracket I1, the laterally outer bracket I8 is formed with a .slot 3| which is open at one end, the forward portions of the bracket on opposite sides of the slot being turned backwardly, as at 33, to form generally vertically aligned openings in which a bolt 34 is disposed. 4The bolt 34 is removable to provide for insertion and removal of a crank axle indicated in its entirety by the reference numeral 36, as will be explained below. The welds by which the brackets I1 and I8 are preferably secured to the bar II are indicated at 31 in Figure 5.

The crank axle 36 comprises a generally U- shaped member 4I having an end portion 42 disposed for rocking movement in the opening 2| and the slot 3| in brackets I1 and |8, and is held in place by a pin 44. The other end portion 43 of the crank axle 3'6 is provided with suitable journal means receiving the land wheel 4 of the tiller. The latter wheel is connected to drive a power vlift clutch mechanism, indicated in its entirety by the reference numeral 45. The particular details of the clutch 45 do not per se form any part of the present invention, being disclosed and claimed in my co-pending application, Serial No. 391,918, iled May 5, 1941, now U. S. Letters Patent No. .2,346,514, dated April 11, 1944, to which reference may be had if necessary. The implement parts shown in said patent are portions of the present implement. The clutch mech.- anism 45 includes a driven crank member 46 that is connected-by a link 41 with the master depth adjusting lever 25, as by a pivot bolt 418 (Figure 3). As will be understood by those familiar with agricultural implement power lift clutches, successive half revolutions of the crank 46 resulting from the rotation of the land wheel 4 causes the crank axle 36 to rock upwardly and downwardly in its rocking support in the brackets I1 and I8. The clutch 45 is controlled by a trip lever I which, according to the present invention, is provided with a hammer strap 52 at the lower end of the trip lever, the lower portion of the latter and the hammer strap being apertured to receive a pivot bolt-54 carried at the lower end of a downwardly and forwardly extending arm 55, the upper end of which is apertured to receive the section 42 of the crank axle 36. The latter is provided with an arm 56 welded thereto. as at 51, and the arm 56 is apertured to receive a bolt 58 by which the arm 55 is rigidly connected to form a part of the crank axle 36. At its lower end, the trip lever 5I carries a roller 59 which controls the operation of the power lift clutch 45. A cable 6I extends forwardly from the upper end of the trip lever 5| to the operators station on the tractor 1. A counterbalancing spring is connected at its forward end to a bracket 66 that is lxed, as by rivets or the like, to the arm l'55, and at its rear end the counterbalancing spring 65 is adjustably connected with a depending bracket 61, the upper end of which is welded or otherwise secured to the rearwardly extending section I4 of the frame beam II. rlhe pivot bolt 54 (Figure 5) is in the form of a brace having a bolt section at its upper end and an eye portion (not shown) at its lower end disposed about the laterally inner end oi the crank axle section 43. The brace member is indicated in its entirety in Figure 5 by the reference numeral 10.

The disk gang 2 includes a plurality of soil working disks of conventional construction, the disks being mounted on a gang shaft 8l whereby the disks are supported for -simultaneous rotation. Suitable spacing spools 82 are disposed on the gang shaft between the disks. The disk gang 2 is connected with the frame I by front and rear supports indicated in Figure 3 by the reference numerals 8'6 and 81, respectively. The front disk gang support 86 comprises a swinging crank or link member -88 having at its forward end an upturned portion 89 which is secured by a clamp casting 9| to the forward portion of the diagonal frame section I2. The clamping member 9| includes two parts, one part indicated by the reference numeral 92 embracing the diagonal beam section I2 while the other part 93 embraces the upturned end 89 of the swingable link or crank member 88. yEach of the sections 92 and 93 is split and is provided with a clamping bolt by which the parts may be securely fixed to the frame beam or the member 88. Referring to Figure 1, the clamping bolt for the clamping section 92 is indicated by the rcierence numeral 94 and the clamping bolt for thc other section 93 is indicated by the reference numeral 95.

The member 88 includes a downturned spindle portion 91 that is disposed for rocking movement in an upwardly extending sleeve 98. A collar 99 at the upper end of the sleeve on the section 91 limits the .downward movement of the member 88 relative to the disk gang 2, and a washer I0| and a cotter |02 limits the upward movement of the section 91 relative to the sleeve 98, as best shown in Figure 6. The sleeve 98 is welded to a yoke |05, the arms |06 and |01 of which are apertured to receive a pivot |08 by which a gang shaft bearing |09 is connected to the support 85. The gang shaft 8| is iournaled for rotation in the bearing |09, and the pivot member |08 is disposed transversely of the axis of the gang shaft 8! and perpendicular to the axis of the spindle section 91 ofthe swinging support member 88.

The other support member 81, for the rear end of the disk gang 2, is of similar construction, including a yoke member |I5 pivoted to the rear gang shaft bearing |I6 and having a vertically -disposed sleeve section ||1 in which the lower end of a bracket or support member ||8 is disposed. The member II8 is formed similar to the section 91 and is limited against axial displacement in the sleeve ||1 by substantially the same means shown in Figure 6.. The Vupper end of .the member '1|EIF8 Vcarries :clamping :means |2| by which the standard or support 81 may be :secured 5to the rearwardly `extending section EN of the frame beam in ydifferent y.positions .of :adjustment therealong. Likewise, lthe clamping member 9| may be ii-Xed to the Yforward end of the Ytrarne .section |2 in different positions .of :adjustment as desired. The transverse "pivot .iconnection between the yoke l| |f5 .and the bearing ||6 is indicated by the reference numeral v|23 in Figure 3, the axis. dened by the member |23 being normal to the axis of the sleeve I I1.

The front furrow wheel 5 (Figure 3) is jouri naled for rotation on the lower outturned stub shaft section |.31| of a vertical spindle. 32. The latter is received for verticalsliding movement 4in a sleeve |34 :forming a part of a casting |135 having a clamping section |36 that is .adapted to be secured to the forward vend of the draft beam by any suitable means, such as a pair of U- bolts |38. Abell crank `Hlllhasione arm IM `connected to the lower end 1of a crank screw |42, the upper end `of which is anchored in a .cap member |43 by any suitable means, such as -an eye bolt |44 (Figure l) rockably received-,in a sleeve section |45 of the cap |43. Rocking of the bell crank |40, as will be referred to later, reacts through the adjusting crank screw |42 against the upper end of the spindle |32 for the purpose of raising vand lowering the frontend vof the frame relative to the front furrow wheel 5. In Figure 3, the parts are shown in their raised or transport position. A canvas boot I encloses the spindle |32 between the sleeve |34 and the cap member .|413 -to protect the -portion :of .the spindle that slides through the sleeve and to -retain lubrication thereon.

An arm is .fixed in any suitable manner to the upper end of the front furrow wheel spindie |32 and `is apertured at .its `outer end to receive the upturned end |52 of la .generally 1ongitudinally extending link |53. The latter member is made up of a pair of telescopically associated rod sections |511'` and |55., the latter including a sleeve section 55, the rear end of which is secured to a rod |51 having a downturned end disposed in an aperture in the outer end of an arm |58 secured to the upper end of a spindle |G| on the lower end of which .the rear furrow wheel 5 is `iournaled. A set .screw collar |53 at the forward end of the sleeve section |56 serves to retain the link members |54 and |55 in .adjusted position. It will be noted from Figure 1, that the arms |5| and |53 extend kgenerally in opposite directions, whereby if, for example, ythe front furrow wheel 5 should be turned vin a clockwise direction, the rear furrow wheel 5 would be turned in a counterclockwise direction.

The axle construction for the rear furrow wheel i5 is substantially the same as that Afor the frontI furrow wheel 5. A sleeve member |65 re- 'ceives the vertical portion of the spindle |6| and is provided with a pad |55 which is bolted. as at |61. to a corresponding pad |63 secured, as 'by welding. to the rear end of the longitudinal frame bar section I5. As best shown in Figure 3, the spindle section |5| extends upwardly through the `sleeve section |55 and carries a cap |69 at the upper end to which a crank screw l"|11 is anchored, as by an eye bolt |12 received in a sleeve section |13 on the cap |59. This lspindle is also protected by a canvas boot l0 from Adirt and moisture. The lower threaded end of the crank screw |1| is screwed into a nut member which is pivoted to A"one arm |16 `oi a bell cranky $11. l latter `is mounted for rocking movement Lon fa bracket 1| 18 that `is welded, .as .at |`.='|;9,'to1the:rear endpf their-ame lbarasection 5| y The other :arm of rthe bell :crank L|11 1 `is bent generally :downwardlnas eat k1| 8 (Figure 3) and -isl connected by fa rod |82 l(Figure .1l) toone arm =|8l of =a horizontally disposed `bell rcrank 1| 83 oumaled torrocking m'o-vemention a bracket |84 by a pivot member |85 .(Figure). The bracket |84 is secured to the frame bar H inzany suitable manner, preferably by welding, to 'the side `of :the laterazllyouter `crank axle bracket |8. `The arm .|81

of .the bell Acrank |83 is :connected by Ia lin'k .|88 to an arm `l|239 xed, as 'by welding, to the latera-lly outer pa-rt -rof the crank axle .section 42, as best fshown in Figure 5. 'The other arm =|9| of the berllfcrarrklever |33 is connected 'by a link member 1:82 'to the :downwardly extending arm of the bell crank SMU lassociated with the front furrow wheel 5. Preferably, the 'link member |92 consists of two lstrap sections `|93 and |94, the latter vhaving a downturn'ed `end |595 pivoted, .as at |95, 1-to ya 'pin carried on the downturned arm of the beu crank Mu. The une sections 193 and |94 `may be connected together in different positions :of adjustment to vary the eiective length thereof. As will "be clear from the above description, whenever the power lift iclutch Al|5 is :operated Ato :cause the crank axle 136 Yto rock in .a :generally vertical direction, the upper end of the arm |89 (Figure) shifts lin a .generally 'longitudinal direction, `causing the bell crank "|83 to rock, `and Arocking movement of the 'latter member .is 'transmitted through the link rmembers 1|'82 and .132120 the front and rear furrow wheel -vbell cranks |413 .and |11, thereby raising and lower- Ing the tiller frame substantially fthe same f amount with respect to all three of its supporting wheels. A

As mentioned above, 5the front and rear furrow w.wheels are mounted for `swinging movement about vertical axes, yas `defined by their vertical spindle vsections v.|32 and fHl, one 'wheel being turned 'rin Aone direction while the other wheel'is turned `'in 'the other direction. This action is made .use :of to secure a -steering control 'which permits Ithe -tractor and tiller to be turned in a much lshorter radius 'than is ordinarily possible with vtillersland like implements.

Referring how .more particularly to Figure 1, the 'hitch construction -3 includes a main draft transmitting member 213| connected 'by `a clevis 2172 Sto the lower end of a draft bracket 203, the upper .end of which is welded, as at 2M, to the intermediate portion o'f fthe draft beam 11|. The lower end vof 4the draft fbracket i203 is provided with a plurality fof openings 236 to receive a bolt 201 -iby which the clevis`2|l2 may lbe 4connected to the member 2Min :different vertical positions. The clevis 213i isconnected 'to the rear end `o the :draft transmitting member 23| vby a vertical pivot bolt 22H8., as best shown in .Figure '5. Alaterally swingable hitch member 2.|`| .is connected `a"pivot'member 2|'2 to .the forward end of the mein draft transmitting `member The forward :end lof the k'hitch member 2H is :connected by any suitable means, such as 'clevis members 74,3, [to the draft lbar .8 loi the tractor 1, `and 'the rea-r end of the hitch member 2H, rearwardly of the pivot 2.12, is `provided with ya laterally and rearwardly extending arm I215 'which lis 'apertured to receive ra pivot ymember '216, to which is connected Athe 'forward Jend fof a steering link 211, which preferably consists 'of two :adjustably connected lsections 2|i8 and .12119, whereby 'the :ef-

fective length of the steering link 2|`| may be adjusted. The rear end of the steering link section 2|9 is pivoted, as at 22|, to a steering arm 222 preferably welded to the lower end fof the front furrow wheel spindle |32 just above the juncture with the laterally directed stub axle section |3|, on which the wheel 5 is journaled. A diagonal brace bar 225 is connected by a pin 226 with the main draft transmitting member 20|, and at the other end the bar 225 is apertured and is disposed above the lower end of the steering wheel spindle |32, below the steering arm 222, preferably between the stub axle section |3| and the steering arm, as best shown in Figure 3. Thus, the diagonal brace bar 225 extends substantially directly between the main draft transmitting member 20| and the wheel 5, whether the frame of the tiller be raised or lowered. In the lowered position, the lower end of the frame sleeve |34 is closely adjacent the steering arm 222 and the diagonal brace bar 225. Hence, the link 225 is effective to cooperate with the main draft transmitting member 20| when the disks are lowered into operating position.

The provision of the vertically extending sleeves 98 and |1 provides a novel arrangement of the scraper assembly, best shown in Figure 2. Referring now to this figure, a pair of brackets 23| and 232, preferably identical, have lower laterally deflected portions that are clamped, as by U-bolts 233, to the bearing support sleeves 90 and H1, respectively. A scraper support bar 2-35 is bolted to the upper ends of the scraper brackets 23| and 232 and is apertured to receive bolts 236 by which a plurality lof scraper arms 231 are pivotally connected to the bar 235. A spring 238 is connected between each scraper arm and the bar 235 for urging the scraper 239,

which is fixed to the lowerend of each arm 231, against the associated disk 80. By loosening the U-bolts 233, the brackets 23| and 232 may be lowered or raised as required. Since the scraperv assembly is secured directly to the bearing support sleeves 98 and H1, it will be seen that when the disk gang 2 is adjusted relative to the frame bar I, the Scrapers are adjusted with the disks and that it is not necessary to readjust the scrapers whenever the disks are adjusted. For example, referring to Figure 4, by loosening the clamp |2| and the clamping bolt 95, the rear end of the disk gang may be moved along the'diagonal` bar section I4, the support member 88 swinging about the vertical axis of the clamping section 03. The angle of the section I4 relative to the section |2 and the arrangement of the swinging member 88 are such that in any position of adjustment of the disk gang, the rear disk is always substantially in the same lateral position relative to the rear furrow wheel 6, or, in other words, the laterally inner edge of the rear disk moves generally in a straight line longitudinally cf the* implement when adjusting the disk gang. Thus, the relation of the rear furrow wheel and the rearmost disk behind which the rear furrow wheel runs is not varied when the disk gang 2 is adjusted for different angular positions, such adjustment usually being made to vary the width of cut. In Figure 4, the narrow width of cut is indicated by the position of the disk gang 2 in full lines, while the wide setting is indicated in dotted lines. In both positions it will'be seen that the laterally inner edge of the rear disk is disposed in a vertical longitudinal plane in both positions, and in all intermediate positions. The clamping member ,9| is also adjustable along the diagonal section 2 of the frame beam.

The operation of the implement described above is substantially as follows:

Figure l showsthe parts in operating position, the front furrow wheel 5 running in the furrow opened by the rearmost disk on the previous round. The front and rear adjusting crank screws |42 and |1| may be turned to level the tiller in operation, the rear crank screw |1| being adjusted so that the rear furrow wheel 6 is approximately level with the bottom edge of the disks. The plurality of holes in the left end of the diagonal brace bar 225 permits the pin 226 to be disposed in various positions so as to accommodate various widths of tractors. The pin 226 is placed in the proper hole so that the front disk of the tiller will turn a complete slice adjacent the previously formed furrow. For normal operation, the clamp |2| of the rear standard or Ibearing support 81 is shifted along the frame bar so that the disk gang is approximately parallel with the frame bar section I2. To reduce the Width, the rear bearing standard is moved rearwardly, which adjusts the disk tiller for hard ground, while the width of cut may be increased, as for operating in soft ground, by moving the rear bearing support forwardly. The disk tiller of the present invention is particularly adapted for use in close quarters due, first, to the fact that turning of the tractor in one direction or the other swings the hitch member 2H,4 which causes the front and rear furrow wheels to turn in opposite directions, and second, by virtue of the fact that the steering arm 2|5 of the member 2|| and the steering arm 222 of front furrow wheel spindle |32 are directed generally laterally and rearwardly, which disposes the steering link 2|l' in a position well out of the way 'of the rear wheels of the tractor, even though a sharp turn to the right is made. Referring to Figure l, it will be seen that if the tractor is turned to the right, the front furrow wheel 5 will be turned to the right, but that the rear furrow wheel 6 will be turned to the left, with the result that the rear end of the tiller is turned much more rapidly than would be the case if only one of the wheels, such as the front furrow wheel 5, should be steered by the turning of the tractor. This rapid steering action of the implement is not necessary, and may not be desirable, when transporting the implement. To the end of providing an implement that may be made quite stable for movement at relatively high speed'in transport position, I provide a second opening |52a (Figure 1) in the front furrow wheel arm |5| closely adjacent the axis of the spindle |32 so as tofsecure as little movement as possible. When arranging the machine for transport, the front end |52 of the steering link |53 is removed from the outer end of the arm |5| and inserted in the opening |52a. This opening is placed so that steering movement of the front furrow wheel 5 will now affect the rear furrow wheel 6 very little if any. Thus, when arranged for transport, the tractor turns the front furrow wheel 5 but does not turn the mar wheel to any appreciable extent. The effective length of the steering link 2|1 may be adjusted by shifting the positions oi the members 2|8 and 2|9 for the purpose of landing the front furrow wheels. The position of the tractor 1 in dotted lines in Figure 1 shows the-clearance be` tween the steering link 2|1and the right rear agregan tractor wheel of. the tractor when. making a sharp turn.A

The. particular framer bracketv and crank axleconstruction permits a very simple procedure in assembling the crank axle on the frame. In: the assembly of the crank axle 35, the arm 56 is first welded to the section 132 of the crank axle, and.v then: the. arm 55 is bolted; thereto, s at 58x. The: arm. Hl!)` is their Welded to the ax The right end: of the crank axle section 42 is then inserted in the opening 2i andthe intermediate portion off the section 12 then passed intov the open slot 3|', the bolt 34 being outof the looped sectionsv 33: at-this point. After the crank axle, with both arms 56. and' |89' attached thereto, is connected with the brackets, the bolt 34'- is passed through the looped portions andv the nuts tightened; thereon, thus severing the crank axle 3E in place. The arm E39 is disposed laterally outwardly of the bracket i8; and hence prevents displacement of the crank axle Sirinwardly relative to the supporting brackets I'I` 'and I8. At the other end, a cotter 44 (Figure 1)y is passed through an openingin the right end of the crank axle section 42, and thus prevents laterally outward displacement of the crank axle 3G.`

While I have shown and described above the preferred structure in which' the principlesy of the present invention have been incorporated, it is to be understood that my invention is not to be' limited to the particular' details shown and describedA above, but that, in fact, widely differ'- ent means may be employed in the practice of the broader aspects of my invention.

What I claim, therefore, and desire to secure by Letters Patent is:

1. A disk tiller comprising a frame including a generally diagonal section and a generally rearwardly extending section and bracket means extending laterally outwardly and forwardly from the juncture of said sections, a disk gang having its forward end pivotally connected with the for- Ward portion of said diagonal frame section and its rear end slidably connected with the rearwardly extending portion of said sectiony of said frame, the rear disk of said gang being disposed substantially directly forwardly of the rearwardly extending section of said frame, and a land wheel connected with said laterally outwardly and forwardly disposed brackets and adapted to run on the land to the landward side of*VV the rear disk.

2. An agricultural implement comprising a frame including a generally diagonal beam, a gang of disks disposed generally diagonally, and means adjustably securingr said gang to said beamin different angular positions relative to the line of travel, said means being arranged so that in any position of adjustment the forward edge of the rear'disk lies in a straight line parallel to the line of travel.

3. An agricultural implement comprising a frame 'including a beam having a diagonal portion and a second portion at an angle to the diagonal portion, a disk gang disposed generally parallel to said diagonal portion and including disks and a shaft on which the disks are mounted, bearing supports for the ends of said shaft, means pivotally connecting the bearing support for one end of said shaft with the diagonal portion of said beam, and means shiitable along said second portiony of the beam for adjustably lixing the bearing support for` the other end of the gang shaft thereto to provide for fixing` said disk gang in diiferentangularl positions to.=vary the widthof cut.

4. An4 agricultural implement comprising a generally diagonal frame, a rear `furrow wheel at the rear end of said frame, a gang of disksdisposed generally diagonally forward of said rear furrow wheel, swingable means connecting the forward part of said gang withI the forward part of said frame, and means connecting the rear end of said gang with the portion of said frame forward of said furrow wheel, said last mentioned connecting means being adjustable along said portion of the frame in a direction substantially fore and aft of said furrow wheel to change the angle of said disk gang relative to the line' of travel` but without varying the lateral positionr of the rear disk relative to said rear furrow wheel, said swingable.meansaccommodating the correspending lateral movement of the iront end of said disk gang. V

5. An agricultural implement comprising frame means,'a disk gang, a pair of bearings for rotatably supporting said gang, a pair of yokesl pivotally connected, respectively, with said bearings for movement relative theretoV about transverse axes, and supporting means connecting said yokes with said frame means including a pair of standards on which said yokes are respectively mounted.

6. In a disk tiller or the like, a bearing support comprising a yoke havingvapertured ends defining a transverse axis about which said bearing may rock relative to the yoke, a `sleeve' ixed. to said yoke with its axis perpendicular to said first mentioned axis, a crank member having one end rotatably received in said sleeve, and attaching clamp means rotatably receiving the other endy of said crank member.

7. An agricultural implement comprising a frame member including two sections disposed approximately at right angles, a disk gang. disposed along one section, means connecting one end of said gang with the outer end of said one section and including a crank member swingably connected with said disk gang and said one section, and means connecting the other end of said gang with the other frame section and including a member adapted to be connected with said other section at various points therealong.

8-. An agricultural implement comprising frame means having a pair of laterally spaced brackets, one of said brackets having an aperture therein and the other bracket having a slot therein open at one end, a crank axle adapted to be rockably connected with said brackets for mounting a pair of arms fixed thereto in spaced apart relation, the end of said crank axle being insertable throughthe opening in said one bracket and the portion of the crank axle between ythe arms carried by the latter being insertable into said slottedV portion of the other bracket, means for holding thecrank axle in said slotted portion with one of necting said gang with said frame, including a pair of vertically extending bearing lsupports connected with the ends of. said gang. and. means movably connecting the upper ends of said bearing supports with said frame means, and a scraper assembly connected with the upper ends of said bearing supports, whereby said scraper assembly moves with said gang when the latter is adjusted relative to said frame.

10. A disk tiller comprising frame means including a frame bar having a generally diagonal portion at its front end and a generally rearwardly extending rear portion and a generally forwardly and laterally outwardly extending bracket connected to said frame bar adjacent the juncture between said sections, a crank axle mounted for rocking movement in the forward portion of said bracket, a land wheel rotatably mounted on said crank axle, and a disk gang pivotally connected at its forward portion with the forward portion of said diagonal bar and slidably connected at its rear end with the rearwardly extending portion of said frame bar, the

rear disk being disposed generally forwardly of said rearwardly extending portion of the frame bar and toward the furrowward side of said land wheel.

l1. A disk tiller comprising a. frame including y a generally diagonal section and a generally rearwardly extending section, a disk gang, adjustable means movably connecting one end of said disk gang to said diagonal section, and adjustable means movably connecting the other end of said disk gang to said rearwardly extending section.

12. An agricultural implement comprising a frame including a beam having a diagonal portion and a second portion at an angle to the diagonal portion, a disk gang disposed generally parallel to said diagonal portion and including disks and a shaft on which the disks are mounted, bearing supports for the ends of said shaft, means shiftable along the diagonal portion of said beam connecting the bearing support for one end of said shaft therewith, and means shiftable along said second portion of the beam for adjustably fixing the bearing support for the other end of the gang shaft thereto to provide for fixing said disk gang in different angular positions to vary the width of cut.

` 13. An agricultural implement comprising a supporting frame, a disk gang, a pair ofibearing supports at opposite ends of said disk gang, respectively, and means for mounting said bearing supports on said frame including means for shifting one of said supports relative to said frame along a substantially straight line and means for shifting the other of said supports relative to said frame along an arc.

14. An agricultural implement comprising a supporting frame, a disk gang, a pair of bearing f supports at opposite ends of Said disk gang, re-

spectively, and means for mounting one of said bearing supports on said frame including means for shifting said one support relative to said frame along a substantially straight line and providing for swinging movement of said support about a generally vertical axis, and meansy for f supporting the other of said supports on said frame providing for shifting movement thereof with said gang incidental to said shifting of said one support.

15. An agricultural implement comprising a fra-me, supporting wheels rotatably mounted thereon, a disk gang, a pair of shaft bearings therefor, a supporting standard for each of said bearings and connected thereto by means providing for relative swiveling movement about vertical axes, and shiftable mounting means for each .of said standards providing for shifting movement of the latter relative to said frame in relatively diirerent directions to adjustv said gang angularly relative to said frame and to the line of advance.

16. A disk tiller comprising a frame including a diagonally extending section and a generally fore and aft extending section, a supporting w el mounted on said frame adjacent the forward end of said diagonal frame section, a

vsecond supporting wheel mounted adjacent the rear end of said fore and aft extending Section, and a third supporting wheel mounted at an intermediate point on said frame, a diagonally disposed disk gang, a pair of shaft bearings therefor, means for supporting one of said bearings on said fore and aft extending frame section providing for fore and aft shifting movemnet of said bearing relative thereto, and means for supporting the other of said bearings on said diagonally extending frame section providing for shifting said other bearing generally transversely relative to the line of advance of said implement.

17. A disk tiller comprising a frame including a diagonally extending section and a generally fore and aft extending section, a supporting wheel mounted on said frame adjacent the forward end of said 'diagonal frame section, a second supporting wheel mounted adjacent the rear end of said fore and aft extending section, and a third supporting wheel mounted at an intermediate point on said frame, a diagonally disposed disk gang, a pair.of shaft bearings therefor, a supporting standard for each of said bearings and connected thereto by means providing for relative swiveling movement about Vertical axes, and shiftable mounting means for each of said standards providing for shifting movement of one of said bearings along said generally fore and aft extending frame section and providing for swinging movement of said gang about the vertical axis of swiveling movement of said one bearing, and providing for shifting movement of the other bearing with said gang relative to said diagonally extending section.

18. An agricultural implement comprising a suppo-rting frame, a disk gang, a pair of bearing supports at opposite ends of said disk gang, respectively, and means for mounting said gang on said frame at an acute angle relative to the direction of travel and for adjusting said angle, comprising means for mounting the rear bearing support on said frame providing for shifting said support thereon along a line angled in the opposite direction to the direction of travel, said gang and bearing support being swingable about a vertical axis adjacent the latter to swing the forward edge of the rearmost disk into a position directly in fore and aft alignment with other positions of said edge in other shifted positions of said bearing support, and shiftable means for mounting the forward bearing support on said frame providing for said shifting and swinging` movements of said gang.

19. An agricultural implement comprising a frame, wheel means for supporting said frame including a rear furrow wheel, a disk gang disposed at an acute angle to theV direction of travel, front and rear bearing supports therefor, means for mounting said rear bearing support on said frame to position the rearmost disk directly ahead of said rear furrow wheel to form the furrow in which the latter rolls, said mounting means providing for shifting movement of said rear bearing support along a straight line angled. in the opposite direction to the direction of travel and for swinging said bearing support about a generally vertical axis, and means for adjustably mounting said front bearing support on said frame providing for said shifting and swinging movements of the rear bearing support and gang and adapted to produce a horizontal angular movement of said gang incident to a linear shifting movement of said rear bearing support to maintain the front edge of the rearmost disk in a constant fore and aft alignment with said rear furrow wheel.

20. An agricultural implement comprising frame means, a disk gang, a pair of bearings for rotatably supporting said gang, a pair of yokes pivotally connected, respectively, with said bearings for movement relative thereto about transverse axes, a pair of sleeves iixed to said yokes, respectively, with their axes substantially perpendicular to said transverse axes, and supporting means connecting said yokes with said frame means including a pair of standards on which said sleeves are rotatably received, and means for shiftably attaching said standards to said frame means to adjust said gang angularly relative thereto.

21. An agricultural implement comprising a frame, a gang of disks, means adjustably connecting said gang with said frame including a pair of bearings connected with the ends of said gang, standards extending upwardly from said bearings, and means movably connecting the upper ends of said standards with said frame, a scraper assembly, and means supporting opposite ends of said scraper assembly on said standards, respectively, said supporting means being ad- J'ustable vertically relative to said standards and movable therewith when thealatter arel adjusted relative to said frame.

22. An agricultural implement comprising a wheel supported frame, a gang of disks, means adjustably connecting said gang with said frame including a pair of bearings connected with the ends of said gang, standards extending upwardly from said bearings, and means movably connecting the upper ends of said standards with said frame, a scraper. assembly including a support bar and means supporting opposite ends of said support bar on said standards, respectively, said supporting means comprising clamps embracing said standards and shiftable vertically thereon and bolt means for securing said clampslto said standards in vertically adjusted position, whereby said scraper assembly moves with said gang when the latter is adjusted relative to said frame.

23. An agricultural implement comprising a frame including angularly related sections disposed in a generally horizontal plane, a ground working tool unit, a crank arm swingably connecting one end of said unit with one of the sections of said frame and supporting that end of the tool unit on the frame against relative move ment in a generally vertical direction, and means slidably connecting the other end of said unit with the other section of said frame.

24. An agricultural implement comprising frame means including a pair o! spaced apart brackets, one of saidbrackets being apertured f and the other having a slot formed therein, a crank axle removably associated with said brackets and having one end adapted to be inserted in the opening in said one bracketa portion of said crank axle being adapted to be laid into the slot in the other bracket, an arm permanently mounted on said portion of said axle between said brackets, and means for holding said crank axle in said slot.

25. An agricultural implement comprising frame means including a pair of spaced apart brackets, one of said brackets being apertured and the other having a slot formed therein, a crank axle shiftable axially relative to and removably associated with said brackets and having one end adapted to be inserted in the openling'in said one bracket, a portion of said crank axle being adapted to be laid into the slot in the other bracket, an arm permanently mounted on said portion of said axle between said brackets, and bolt means adapted to bridge the end of said slot for removably holding said crank axle in said slot.

26. An agricultural implement comprising frame means, a working unit,- a pair of bearings for rotatably supporting said unit, a pair of yokes pivotally connected, respectively, with said bearings for movement relative thereto about transverse axes, a pair of sleeves fixed to said yokes, respectively, with their axes substantially perpendicular to said transverse axes, and supporting .means connecting said yokes with said frame means including a pair of standards on which said sleeves are rotatably received, and means for shiftably attaching said standards to said frame means to adjust said unit angularly relative thereto.

27. An agricultural implement comprising frame means, a working unit, a pair of bearings for rotatably supporting said unit, a pair of yokes pivotally connected, respectively, with said bearings for movement relative thereto about transverse axes, a pair of sleeves xed to said yokes,

respectively, with their axes substantially perpendicularto said transverse axes, and supporting means connecting said yokes with said frame means including a pair of generally downwardly extending standards on which said sleeves are received.

28. An agricultural implement comprising frame means, a working unit, a pair of bearings for rotatably supporting said unit, a pair of yokes pivotally connected, respectively, with said bearings for movement relative thereto about transi 

